Process for flameproofing fibre materials of polyesters and cellulose

ABSTRACT

A process is provided for the flameproofing of polyestercellulose fibre blends with aqueous preparations, which contain at least a tetrabis-(hydroxymethyl)-phosphonium salt, a phosphorus compound containing at least one radical of the formula   WHEREIN R1 and R2 each denote an alkyl, alkenyl or halogenoalkyl radical with at most four carbon atoms and X denotes a methyl radical or a hydrogen atom, an aminoplast precondensate and optionally, an aliphatic or aromatic polyhalogenated phosphoric acid triester. The treated fibrous materials are dried and then subjected to a heat treatment.

United States Patent [1 1 Hoimann et al.

14 1 Nov. 13,1973

1 1 PROCESS FOR FLAMEPROOFING FIBRE MATERIALS 0F POLYESTERS AND CELLULOSE [75] Inventors: Peter Hofrnann, Uznach; Herman Nachbur, Dornach, both of Switzerland [30] Foreign Application Priority Data Apr. 27, 1970 Switzerland 6250/70 [52] 11.8. C1 117/136, 106/15 FP,117/138.8 F, 117/143 A, 252/81 [51] int. Cl C09d 1/00 [58] Field of Search 117/136, 143 A, 138.8 F; 252/81; 106/15 F? [56] References Cited UNITED STATES PATENTS 3,374,292 3/1968 Zahir .1 117/136 X 3,993,746 7/1961 Miles et a1, 1 1. 117/136 X 3,084,072 4/1963 Deeley 1 117/137 X 3,121,106 2/1964 Nagy 106/15 FP Primary Examiner-William D. Martin Assistant Examiner-Theodore G. Davis Attorney-Harry Goldsmith, Joseph G. Kolodny and Mario A. Monaco [57] ABSTRACT A process is provided for the flameproofing of polyestor-cellulose fibre blends with aqueous preparations, which contain at least a tetrabis-(hydroxymethyU- phosphonium salt, a phosphorus compound containing at least one radical of the formula wherein R, and R, each denote an alkyl, alkenyl or halogenoalkyl radical with at most four carbon atoms and X denotes a methyl radical or a hydrogen atom, an aminoplast precondensate and optionally, an aliphatic or aromatic polyhalogenated phosphoric acid triester. The treated fibrous materials are dried and then subjected to a heat treatment.

18 Claims, No Drawings PROCESS FOR FLAMEPROOFING FIBRE MATERIALS OF POLYESTERS AND CELLULOSE P CH- wherein R and R each denote an alkyl, alkenyl or halogenoalkyl radical with at most four carbon atoms and X denotes a methyl radical or preferably a hydrogen atom, 3.) an aminoplast precondensate and 4.) optionally, an aliphatic or aromatic polyhalogenated phosphoric acid triester, and that the materials thus treated are dried and subjected to a heat treatment.

Preferably, a tetrakis-(hydroxymethyD-phosphonium halide, such as, for example, the bromide or especially the chloride, that is to say tetrakis-(hydroxymethyl)- phosphonium chloride (=THPC), is used as component l The component (2) can be the most diverse reaction products which contain at least one radical of the formula (1).

Preferably, these radicals are radicals of the formula (2) Rho o Many reaction products which can be employed as component (2) in accordance with the invention are known, for example:

1. French Patent Specification No. 1,422,893 describes polymeric and polymerisable phosphorus compounds.

2. N,N-Dimethylolcarboxy1ic acid amides are described in French Patent Specification No. 1,560,824.

3. French Patent Specification No. 1,577,573 refers to thiophosphonocarboxylic acid monomethylolamides and dimethylolamides and their ethers.

Reaction products of phosphonocarboxylic acid amides with glyoxal, formaldehyde, optionally with urea and optionally with an alcohol are described by French Patent Specification No. 1,576,727.

5. German Published Specification No. 1,933,479 describes reaction products of condensation products of 2 mols of a phosphonocarboxylic acid methylolamide or of 1 mol of phosphonocarboxylic acid amide with formaldehyde, and optionally with an alcohol.

6. French Patent Specification No. 1,395,178 and 1,524,670 describe the preferentially used phosphonocarboxylic acid methylolamides.

7. Aminoplasts containing phosphorus, that is to say the also preferred reaction products of aminoplastforming compounds and phosphonocarboxylic acid amides, wherein one of these two components must be methylolated and optionally etherified, with formaldehyde and optionally an alkanol, are described in French Patent Specification No. 1,466,744 and in particular in German Published Specification No. 1,933,444.

Other reaction products which can be used in accordance with the Invention as component (2) are, for exnl-o cnhcn-co-n ample, the following products:

8. Phosphorus compounds with a hetero-ring containing eight ring members, corresponding to the formula wherein R, and X have the indicated meaning.

Products of particular interest are reaction products which contain at least one radical of the formula (0) Ri-D wherein R, denotes an ethyl or methyl radical, or especially of the formula (4) HID-O 0 wherein R,, R,, R 11,, X and K have the indicated meaning, Y and Y represent an alltyl radical with at most four carbon atoms or preferably a hydrogen atom 5 and A represents an alkyl radical with one to 22 carbon atoms, a halogenoalkyl radical with at most four carbon atoms, a hydroxyalkyl radical with at most four carbon atoms, an alkenyl radical with two to 22 carbon atoms or an optionally halogenated benzene or benzyl radical. These compounds are appropriately manufactured by first condensing 2 mols of the corresponding phosphono-carboxylic acid amide with 1 mol of the corresponding carbamate, one of these starting components being methylolated, and subsequently reacting the product, at elevated temperature, with formaldehyde, and thereafter optionally still etherifying the product with an alkanol. Preferably, lower alkyl carbamates are used for the process.

10. It is also possible to use phosphorus compounds of the formula wherein R,, R,, R,, R,', X, X and Y have the indicated 20 meaning and A, represents an alkylene radical with two to three carbon atoms which is optionally substituted by lower alkyl, lower alltoxy or hydroxyl groups, and Z represents an oxygen or sulphur atom. These compounds are appropriately manufactured by reacting 1 25 mol of a condensation product of 2 mols of the corresponding phosphonocarboxylic acid amide with 1 mol of the corresponding cyclic diamine, one of these starting components being methylolated and optionally etherified, with formaldehyde at elevated temperature, 3.0

and subsequently optionally reacting the product with an alkanol.

I 1. Further suitable reaction products correspond to the formula However, reaction products of the nature described under Nos. 6 and 7 are preferentially used.

The reaction products according to No. 6 are, in particular, phosphonocarboxylic acid methylolamides of the formula wherein R R,, X and Y have the indicated meaning.

Amongst these compounds, those of the formula cated meaning and A, represents a radical of the for- (13) /P\ mula CO--, CS, SO,-, CNH- or CONE-CO, wherein E denotes a hydrogen atom or a radical of the formula Cl-h-O-Y. These phosphorus compounds are appropriately manufactured by reacting 1 mol of a condensation product of 2 mols of a corresponding phosphonocarboxylic acid amide and 1 mol of urea, thiourea, sulphamide, guanidine or biuret, one of the two starting components so (9) HsC O O HaCO 12. Moreover, it is also possible to use phosphorus compounds of the formula wherein R X and Y have the indicated meaning, are preferred.

Particularly suitable compounds are, however, those of the formula OCH: [CHzUIDh and especially of the formula Ilse-O O wherein R, has the indicated meaning and Y denotes a methyl group or preferably a hydrogen atom.

The reaction products described under N0. 7 are mo Cm or 2 h preferably those from (a) a nitrogen compound which can be at least dimethylolated, (b) a compound of the H2 formula I l i it-N NH llN NH Ri\ %O (16 r RsO cm-onc0Nm However, 1,3,5-triazines substituted by at least two i primary amino groups, urea and the compound of the wherem and x have md'cated meanmg (c) formula (17) are preferred. Melamine is of particular formaldehyde or a formaldehyde-releasing agent and interest (d) optionally, an alkanol with at most four carbon Th: component preferably cormsponds m he atoms. formula These reaction products used for the process accord- (m) 0 ing to the invention can be obtained by reaction of the 5 components (a), (b), (c) and optionally (d) in the most diverse sequences. For example, it is possible first to 34-0 CHT (l3H' C0NH react the components (a), (b) and (c) simultaneously X with one another and subsequently optionally further wherein R, and X hav the indi at d meaningto etherify the product with the component (d). 20 Components 0 which correspond to th ula Another possibility is to allow the component (a) to (20) p react with the component (c), then with the component (b) and thereafter optionally with the component O GHQ-C mncnqmi (d). Furthermore, these reaction products can be obwherein R, denotes an ethyl or methyl radical, are of tained by reaction of the component (a) with the com- Particular fl ponent (c), then with the component (d) and thereaf- Amongst the compounds of the formula (20 3- ter with the component (b). Moreover, such reaction (dimethylphosphono)-propionic acid amide has proved products are obtained if first the components (a) and particularly advantageous. (b) are each individually reacted with the component Reaction products of hexamethylolmelamine or hex- (c), then the two reaction products are reacted with amethylolmelamine-pentamethyl-ether and 3- one another, and thereafter the product is optionally (dimethyl-phosphono)-propionic acid amide, and opfurther reacted with the component (d). Additionally tionally formaldehyde, have, above all, proved very it is also possible first to react the component (b) with suitable reaction products for use as component (2) in the component (c) and optionally with the component the process according to the invention. (d), and then to allow the product thus obtained to Other preferred components (2) are reaction prodreact with the component (a). ucts of dimethylolmelarnine or hexamethylolmelamine Suitable nitrogen compounds which can be at least and 3-(di-methylphosphono)-propionic acid methyloldimethylolated component (a)] are compounds amide. which can be converted, by addition of formaldehyde, These reaction products can furthermore also correinto so-called curable aminoplast precondensates. The spond to the formula following may be mentioned: 1,3,5-aminotriazines such O as N-substituted malamines, for example N- butylmelamine, as well as ammeline. guanamines, for example formoguanamine, benzoguanamine, Rho F acetoguanamine and also diguanamines. Further possi- N f bilities are: biuret, guanidine, thiourea, alkylureas or .N-) C-N/ .o arylureas and alkylthioureas or arylthioureas, alm kyleneureas or alkylenediureas, for example cm o lPYEIMPHlMl ethyleneurea, propyleneurea or acetylenedturea; 4,5-dihydroxy-imidazolidone-2 and derivatives thereof, wherein R, and X have the indicated meaning, Y, for example, 4,5-dihydroxyimidazolidone-2 substituted denotes an alkyl group with at most four carbon atoms in the 4-position, at the hydroxyl group, by the radical and m, n and p each denote a positive integer, with m CH CH,CONHCH,OH. Further possibilities having a value of 4 to 6, n having a value of 3 or 4 and are also cyclic nitrogen compounds, for example of the p having a value of at most n 1. For example, such a formulae compound can be the compound of the formula (22) moo 0 0 00m a I P rnco \CH:-CH;-C0-NHGH| cnvs r oc mc-mc ocrt, I-I 11,00 0 1? 0 /OCH3 -CHt /P\ H|C-OH o I /P\ H moo CH1CH2-CO-N-CH1 N N oH,-N-oc-cHt-0H, OCH:

N- (i #N/ a 11,00 CH1-CH1-CON-CH1 N CII:NOCCIIz-CH: 00H; P It, OH mil-0a P/ 1: mo 0 o o o 0 II;

The reaction products of the formula (2l are conveniently obtained if a compound of the formula (I6) is condensed with a 1,3,5-triazine containing at least two primary amino groups, it being necessary for the H,N groups of one of these two starting components to be methylolated, whilst warming, preferably in the presence of an organic solvent which forms an azeotrope with water, the product is post-methylolated with formaldehyde or a formaldehyde-releasing agent at elevated temperature, optionally in the presence of a basic catalyst, and this product is optionally subsequently still etherified with an alkanol containing at most four carbon atoms.

The post-methylolations with formaldehyde or a formaldehyde-releasing agent such as paraforrnaldehyde advantageously take place at temperatures of up to 150C. Possible catalytically acting bases which are optionally conjointly used are, for example, sodium hydroxide, potassium hydroxide, sodium acetate, magnesium carbonate or magnesium oxide.

A preferred embodiment for the manufacture of the reaction products consists of reacting a compound of the formula (16) with a methylolated, optionally etherified component (a) in the melt, that is to say in the absence of a solvent, at temperatures of 100 to 150C.

Reaction products according to No. 6 or according to the formula (13) are preferably used together with the components (I) and (3) and without the component (4). Reaction products according to No. 7 or reaction products from components (a), (b), (c) and optionally (d), on the other hand, are preferably used together with the components (1), (3) and (4).

By aminoplast precondensates used as component (3), there are understood addition products of formaldehyde to nitrogen compounds which can be methylolated. The following may be mentioned: l,3,5-aminotriazines such as N-substituted melamines, for example N-butylmelamine, N-trihalogenomethyl-melamines as well as ammeline, guanamines, for example benzoguanamine or acetoguanamine, or also diguanamines. Further possibilities are also: alkylureas or arylureas and alkylthioureas or arylthioureas, alkyleneureas or alltylene-diureas, for example ethyleneurea or propyleneurea, acetylene-diurea or especially 4,5-dihydroxyimidazolidone-2 and derivatives thereof, for example 4,5-dihydroxyimidazolidone-2 substituted in the 4-position, at the hydroxyl group, by the radical CH,CH,CONHCH,-H. The methylol compounds of a urea, of an ethylene urea or of melamine are preferentially used. Both the predominantly monomolecular and the more highly precondensed compounds are suitable as starting products.

Ethers of these aminoplast precondensates can also.

are those which contain at most four carbon atoms in the alkyl radical and wherein each alkyl radical is substituted by 2 or 3 halogen atoms, for example bromine atoms or chlorine atoms. Tris-(2,3-dibromo-2- chloropropyl)-phosphate or especially his-(2,3- dibromopropyl)-phosphate may here be specifically mentioned as component (4). Additionally, however, triaryl esters, such as tris-(polybromo-aromatic) phosphates, for example polybrominated triphenylphosphate or tricresylphosphate should also be mentioned.

The aqueous preparations for flameproofing polyester-cellulose fibre materials as a rule contain 180 to 320 g/l, preferably 200 to 285 g/l, of the component (1), 30 to 220 g/l, preferably 40 to 200 g/l, of the component (2), 10 to g/l, preferably 20 to 50 g/l, of the component (3) and 0 to 200 g/l, perferably 0 to 140 gll, of the component (4). It is advisable so to match the quantity ratios of the individual components that the preparations contain about 55 to 65 g/l of phosphorus and about 15 to 30 g/l of nitrogen (without counting other nitrogen-containing constituents). The aqueous preparations are obtained by simply mixing the components (l) to (4) and adding an appropriate amount of water. In the undiluted state, the mixtures of the components (l) to (4) are viscous, and on dilution with water finely disperse emulsions of good stability result.

The preparations for flameproofing can optionally contain yet further additives. To achieve a greater deposit of substance on fabrics it is, for example, advantageous to add from 0.1 to 0.5/ of a high molecular polyethylene glycol. Furthermore, the customary plasticisers can be added to the preparations. Favourable effects can also be achieved if aminoplast-forming compounds such as, for example, urea are conjointly used. An addition of curing catalysts, such as, for example, ammonium chloride, ammonium dihydrogen orthophosphate, phosphoric acid, magnesium chloride or zinc nitrate is also possible but is in most cases not necessary, since the reaction products to be used according to the invention in most cases cure of their own accord at higher temperatures. The addition of an emulsifier is frequently not necessary, since the phosphoruscontaining reaction products [component (2)] in part are themselves very effective emulsifiers for the polyhalogenated phosphoric acid esters. it frequently proves advantageous to add buffer substances, such as, for example, trisodium phosphate or triethanolamine, to the preparation.

The fibre materials to be provided with a flameproof finish in accordance with the invention are preferably textiles. In particular, polyester-cellulose mixed fabrics are used, wherein the ratio of the polyester component to the cellulose component is from 1:4 to 2:]. Thus, for example, so-called 20/80, 26/74, 50/50 or 67/33 polyester-cellulose mixed fabrics can be used.

The preparations are now applied to the mixed fibre materials of polyester and cellulose, and this can be performed in a manner which is in itself known. Preferably, piece goods are used and impregnated with a padder of the customary construction, which is fed with the preparation at room temperature. The cellulose components of mixed fibre materials can be based on natural or regenerated cellulose, for example linen, cotton, rayon or viscose staple.

The fibre material impregnated in this way must now be dried, and this is preferably done at temperatures of up to l00C. It is then subjected to a heat treatment at temperatures above C, for example between and 200 C, preferably at 140 to 180C, the duration of has formed to the extent of 75 percent. A 60 percent which can be the shorter, the higher is the temperature. strength aqueous solution (Product B) is used for appli- This duration of heating is, for example, 2 to 6 minutes cation. at temperatures of 180 to 140C. Example 3 A rinse with an acid-binding agent, preferably with 5 362 parts (2 mols) of 3-dimethylphosphonoproaqueous sodium carbonate solution, for example at bepionamide and 422 parts (2 mols) of 3-dimethylphostween 40C and the boiling point, and for 40 to 3 minphonopropionic acid methylolamide are suspended in utes, is advisable in the case of a strongly acid reaction 1,000 parts of toluene in a stirred flask of 2,500 parts medium. by volume capacity, equipped with a water separator.

The process according to the invention yields fibre Four parts of p-toluenesulphonic acid are further materials having a very good permanent fiameproof added, and the mixture is heated to the boiling point of character. the toluene, whilst azeotropically removing the water As a rule, the fabrics finished in accordance with the formed during the condensation and collecting it in the invention showed a pleasant, barely stiffened, fabric water separator. After 3% hours reaction time, no furhandle. ther water is formed. Thirty-three parts of water (cal- The percentages and parts in the examples which folculated, 36 parts), are obtained. The toluene is thereaflow are percentages by weight and parts by weight, reter removed in vacuo, 123 parts of 97.5 percent spectively. The relation of parts by volume to parts by strength paraformaldehyde (4 mols) and 6 parts of weight is as of ml to g. solid sodium methylate are added to the melt which is left and the whole is heated to 100C internal tempera- Manufacm'mg Instmcnom ture for minutes whilst stirring, the water separator Example 1 having beforehand been replaced by a reflux con- 21] parts (1 mole) of 3-(dimethylphosphono)- denser. The mixture is then cooled to 6065C and propionic acid methylolamide and 71 parts (0.166 800 parts of methanol are added. The whole is cooled mol) of a 90 percent strength hexamethylolmelamine- 25 to 10C whilst stirring rapidly, and unreacted paraforpentamethyl-ether are reacted in a 500 parts by volume maldehyde which has separated out is filtered off. The stirred flask, equipped with a reflux condenser and filtrate is concentrated in vacuo at C. thermometer, foratotal of 50 minutes at 118 to 125C. 860 parts of a clear, yellowish syrup are obtained, After the end of the first 30 minutes reaction time, the which has a solids content of 96.3 percent. apparatus is placed under vacuum and the methanol 30 Total CH,O content 50.3 parts produced is distilled off. This treatment is carried out Free Cl-l,0 content 1.3 parts for a further 20 minutes, after which the mixture is im- Bonded CH,0 content 49 parts; mediately cooled to room temperature. this probably corresponds to an 81 to 82 percent for- Product A is obtained as a colourless, clear, viscous mation of the monomethylol compound of the formula 01130 0 (211,011 0 0011; I PCH CH C o-N-c11,-11No c-c111-cm- P c 11: o o c 11] syrup which contains practically 100 percent of active The product is applied as an aqueous solution of 72 substance. percent content (Product C). Example 2 Example 4 59 parts of glyoxalurea (glyoxalmonourein) and 181 181 parts (1 mol) of 3-(dimethy1phosphono)- parts of 3-dimethylphosphonopropionamide are heated propionic acid amide, 123 parts (4 mols of CH,O) of to 1 15C in a reaction vessel of 500 parts by volume ca- 97.5 percent strength paraformaldehyde and 0.9 parts pacity, equipped with a stirrer, and after a few minutes of p-toluenesulphonic acid monohydrate are warmed the resulting melt is again cooled to room temperature. to 100C internal p r r Whilll Stirring, in a 500 Thereupon, 162 parts of 37 percent strength aqueous parts by volume stirred flask equipped with a conformaldehyde solution are added and the resulting sodenser and thermometer, and are kept for 6 hours at lution is adjusted to a pH value of 9 with 30 percent this temperature. After this time, a sample of the reacstrength sodium hydroxide solution. Methylolation is tion product shows, in a thin layer chromatogram, that carried out at room temperature for 6 hours at this pH, practically all 3-(dimethylphosphono)propionic acid whilst stirring. 400 parts of an orange-yellow, clear soamide has reacted. The mixture is cooled to C, 300

lution are obtained. The solids content is 73 percent. arts of methanol are added, and the whole is cooled 0n the basis of the content of free formaldehyde found, to 15C whilst stirring rapidly. Thereafter the free paraa phosphorus-containing reaction product which conformaldehyde is filtered off and the'methanol is retains the trimethylol compound of the probable formoved in vacuo. 60 246 parts of a yellowish, clear product of low viscos- HaC-0\ /O O\ (Ii-CH2 P 11 011,-011 \P/ l 113co CH CH fi-NCIICHN-(fH,CH C 0-0113 ity are obtained, which contains 100 percent of active of 8.5 to 9. The pH value is kept constant by gradual substance and corresponds to the formula addition of a total of 10 parts of 40 percent strength so- 103) CH;\ 2) 0\ /0cn.

P (:mon,c 1 cmo CII1C1I|C0-N \v-cocmofi \OCH:

CHn-O-HgC (Product D). dium hydroxide solution. After cooling, 980 parts of a Example clear, colourless product of low viscosity are obtained,

220 parts (-l mol) of 96 percent strength 3- which has a solids content of 71.7 percent. For applica- [dimethyl-phosphonol-methylolpropionamide, tion, the product is concentrated to 80 percent of solids pared by methylolation of 3 (di th l h h content. The reaction product corresponds to the forpionamide, and 37.5 parts (0.5 mol) of methylcarba- CHZO 0 CH9 (1 ()III r (111,011 (6. (:in 0mm: l

mate, in the presence of 1.2 parts of p-toluenesul- (Product F). phonic acid and 200 parts of benzene, are brought to Example 7 the boil under reflux, with rapid stirring, in a 500 parts I86 parts (0.88 mol) of 3-(dimethylphosphono)- by volume stirred flask equipped with a water separator propionic acid methylolamide are reacted with 96 parts and a thermometer. parts of water of condensation (0.44 mol) of a compound of the formula are formed in this manner over the course of 12 hours,

and collected in the water separator. After this time, no (we) further water is formed. The benzene is distilled off, C and thereafter 30.7 parts (-1 mol) of paraformal- H;C-OIIC/ Cm dehyde (97.5 percent strength) and 2 parts of magne- I{O- H=C N N CH20H sium oxide are added at C. The mixture is then heated to C and kept at this temperature for 30 H minutes, after which it is cooled to room temperature. W 0 It is then diluted with 250 parts of methanol, the solufor 2 hours at to C internal temperature, in a tion is clarified by filtration, and the methanol is re- 40 500 parts by volume stirred flask equipped with areflux moved in vacuo. condenser and thermometer. A yellow syrup of 100 230 parts of a colourless syrup are obtained, which percent solids content is obtained; (Product G). gives a clear solution, of neutral reaction, in water, and Example 8 which corresponds to the formula 60 parts (0.5 mol) of dimethylolurea and 181 parts CHQO O O OCH;

(Product E). (1 mol) of 3-(dimethylphosphono)-propionic acid Example 6 amide are suspended in 200 parts of toluene in the ap- 660 parts (3 mols) of 96 percent strength 3- 55 paratus described in Example 3, and condensed in the [dimethyl-phosphonol-methylolpropionic acid amide, usual manner. The theoretical quantity of 18 parts of parts (1.5 mol) of propyleneurea and 4 parts of water is obtained within 4 hours. Thereafter the mixp-toluenesulphonic acid monohydrate in 500 parts of ture is cooled and the residual formaldehyde content is benzene are rapidly heated to refluxing in a 2,000 parts determined. This is still 3 parts.

by volume stirred flask equipped with a water separator 60 61.5 parts (2 mols) of 97.5 percent strength paraforand thermometer. A total of 47 parts of water of conmaldehyde and 6 parts of sodium methylate powder are densation are formed in this way over the course of 24 then added and post-methylolation carried out for 2 hours, and collected in the water separator. After this hours at 100C. Thereafter the mixture is cooled and time, no further water is formed. The benzene is disdiluted with 150 parts of methanol, excess formaldetilled off as far as possible, and the residue is cooled to hyde is filtered off and the methanol is removed in 50C. Thereafter, 247 parts of aqueous formaldehyde vacuo at 40C.

solution (36.4 percent strength) are added and methyl- A colourless, clear, water-soluble 100 percent olatign is carried out fpr 3 hours at 60C and a pH value strength product of medium viscosity is obtained,

l3 14 which on the basis of the formaldehyde content deterparts of a colourless liquid of low viscosity (100 permined corresponds to the following formula: cent solids content) are obtained. The product can be cm 0 0 mm,

I I cumin l l l I 01130 cm CiIIUO' -NGlI= NV-(1 -N 4111: 41 -00 um 4m: 00m up (Product H). easily polymerised in aqueous solution at 70C in the Example 9 presence of a trace of ammonium persulphate. The

4.35 mols of sodium methylate in 35 ml of methanol rodu t orre ond to the formula are added to 250 ml of dioxane which contains 72 g (1 mol) of acrylamide and 162 g (1 mol) of diallyl phosphite. After adding 32 m1 of the sodium methylate solution, the temperature is raised to 8090C through an exothermic reaction starting in the reaction mixture. 1130-0 CH:*ClIz CO*NIICII;I\T1I J1U-C1L=Cllz The remainder of the sodium methylate solution is A added slowly when the exothermic reaction subsides. (Produc! (103) 15 II3C- o o After completion of the reaction, the mixture is cooled Example 1 l and the intermediate product is filtered off. After wash- P y p p 'P 'P acid ing with benzene and subsequently drying, 213.2 g of amide- 96 Parts of Pal'afm'maldehydE P an intermediate product are obtained strength) and 0.6 part of magnesium oxide are heated 119 g of this intermediate product are reacted with t0 100C in a 500 ml flask q pp with a stirred- 41 g of a 36.5 percent strength formaldehyde solution flux condenser and thermometer- A cloudy is P at 55 to 60C During the reacfion, the pH value is duced, which is stirred for minutes at this temperakept at 7.5 to 8 by adding alkali. After 2 hours, the ref cooled to P "P A syrup of action mixture is cooled to room temperature and filpmmcally 100 Percent 50nd} i is Producedtered. An 82 percent strength solution of N- 30 A formaldehyde determination Show! that mg (hydroxymethyl)-3-(diallylphosphono)-propionamide f Y P PP E P is obtained; (Product dlmethylolamlde is present In a yield of 83 percent;

Example 10 (Product L).

211 parts (1 mol) of 3-[dimethylphosphono1pro- APPLlCATlON EXAMPLES pionic acid methylolamide (anhydrous product), 72.5 Exampk 12 Parts of 98 percent strength acrylamide (1 An undyed :50 polyester-cotton fabric is padded P of y q q y and 1 P of with liquors I m xv of Table 1 below, and dried at 30 P'toluenesulphomc acid In 200 P of benzene are to 100C. Thereafter curing takes place for 4% minutes brought to the boil under reflux, with vigorous stirring, at 150%;

in a stirred "555d of 500 Parts y Volume capacity, 0 The fabrics are rinsed for 5 minutes at C in a deq pp with reflux condenser, thel'mmneiel' and tergent solution which contains 4 g/l of sodium carbonwater separator, and are kept under these conditions ate and 2 8/] f a condensation product of 1 mo] of until no further water is produced. 16 parts of water are tcfl,-nonylphgnol and 9 mols of ethylene oxide.

obtained, corresponding to a conversion of 89 percent A part f hi f b i i w w h d 5 tim m- 10 of theory. The reaction mixture is thereafter cooled to 45 i es for 30 minut s in a solution at 60C which conroom temperature and slowly poured into 2,000 parts tains 2 g of anhydrous sodium carbonate and S g of by volume of acetone, and the polymeric constituents soap per litre of water SNV3 wash).

which have precipitated are suspended in a fine form The individual pieces of fabric are then tested for by means of a high speed stirrer. After filtering off 50 their flameproof character (DIN 53,906 vertical test, 8 these polymeric constituents (30 parts), the filtrate is seconds ignition time). The results of this test are sumfreed of benzene and acetone in vacuo at 50C. 227 marised in Table II.

'IAB LE I Treated with liquor Constituents (amounts in g./1.) I II III IV V VI VII VIII IX X XI XII XIII XIV XV 'IHPC, 330 350 330 330 330 330 330 330 330 330 350 350 375 330 330 Product A, 90 56 92 92 [)2 92 92 89 89 67 67 44 3-(dlmethylphosphono)-proplonlc acid methylolamide, 80 a 51 e. 125 Tris-2,3411 bromopropylphosphate 44 67 73 73 73 73 73 71 71 133 83 74 Dlmethylolrnelamine 33 30 33 33 33 33 33 30 30 30 40 46 42 42 Dimethylolglyoxalmonourein, 40 210 TABLE II Treated with liquor Flameproof character Untreated I II III Iv V VI VII VIII IX x XI XII XIII XIV xv After rlnso;

Ignition tin1c,sec.$ (I (l (l (l I 0 (I O (I 0 ti 0 (I ll Ignition time, sec do i (I 0 0 0 [I II I) (l (l (I (I (I [I 0 il Toarlgnatlxgcm... ll 11.5 ll 10 i 7.5 8.5 8.5 8.5 8.5 in It] it) 10,5 AfterillX N i Igniiiontimmscc. do I 0 (l (l (I 0 U 0 1) Ii 0 1) (i 1| 1| (I Tear length,cm "I 9.5 10.5 8 ".5 10 8 T 9.5 8.5 8.5 8.5 8.5 it 7.5

Example 13 uptake) and dried at 80 to 100C. Thereafter curing is An undyed 67:33 polyester-cotton fabric is padded carried out for 4% minutes at 160C. The fabrics are with liquors l to X] of Table III below, and dried at 80 rinsed for 5 minutes at 60C in a detergent solution to 100C. Thereafter curing is carried out for 4% at which contains 4 g/l of sodium carbonate and 2 g/l of 160C. a condensation product of 1 mol of nonylphenol and 9 The fabrics are rinsed for 5 minutes in a detergent solution which contains 4 g/l of sodium carbonate in 2 g/l of a condensation product of 1 mol of p-tert.- nonylphenol and 9 mols of ethylene oxide.

A part of these fabrics is now washed 5 times or 10 times for minutes in a solution at 60C which contains 2 g of anhydrous sodium carbonate and 5 g of soap per litre of water SNV3 wash).

The individual pieces of fabric are then tested for their flameproof character (DIN 53,906 vertical test,

mols of ethylene oxide. Thereafter the fabric is rinsed and dried.

A part of these fabrics is now washed 5 times or 10 times for 30 minutes at 60C in a solution which contains 2 g of anhydrous sodium carbonate and 5 g of soap per litre SNV-3 wash).

The individual pieces of fabric are then tested for their flameproof character (DIN 53,906 vertical test, 8 or 10 seconds ignition time). The results are summarised in Table VI below.

12 seconds ignition time). The results of this test are 30 P C C lids content in percent summarised in T bl [V bel w, percent PC Phosphorus content in percent.

TABLE III Trvntod with liquor Constituents (111 n.) I 11 III IV V VI v11 VIII IX X XI 'IIIIC, 80% 33 330 330 330 350 350 330 330 330 330 330 Product A, 100% 92 J2 92 80 67 61 .12 {)2 8 3-(di1nethylphosphonu)-propi0nlc acid mntliylolanilde, 80% Tris-2,3-dibro1nopropylphosphatc 73 73 73 hiniethylolmelaminn 33 33 33 Urea 30 H;PUi,85% 5.5 Trit'thanolamine 3U N83P0| I 1 I I pH of the liquor G ./'I.:

TABLE IV Treated with liquor Flamoproofcharucter Untreated I II III IV V VI VII VII IX X XI PI ti 5 O [I I) 0 0 0 0 (I n t on 1110, see 1 m length,cn1 ....i "'"1 m a 10.5 8.5 1' 11.5 13 10 12.5 11.5 10 After 5XSNV-3:

I nition time, set: do (I I) (i l) 0 0 0 O (I (i (1 Par]e|1tl1,cm. 10 10.5 12 10 J 11.5 8 11.5 12 13 I0 Aitt-r IDXS V-3:

Ignition time, seo.... ll 0 O 0 0 O Tear length, cm J 11 8.5 9.5 8.5 10.5

Example 14 An undyed 50:50 polyester-cotton fabric is padded with liquors I to XI of Table V below percent liquor b. The procedure indicated under (a) is followed, but using a 67:33 polyester-cotton fabric. Tables VII and VIII contain the results.

TABLE V Treated with liquor Percent I'erccnt 4 Constituents (amounts in 11./l.) PC 11 III I\' VI \II \III IX X XI TIll 80 13 330 330 330 33c 330 330 330 33 330 33g 330 Product IL. 60 6. 6 2'22 1 I 7 Product (f 1 72 11 v Product I 100 13.

Product E.. 1 100 12. 3 v

Product F. 80 10. 2 Product (1., 100 11.5 Product 11.. 100 12.8 1 Product 1. 82 J. 6 Product. K.. 100 11.7 Product, L 1 100 12.8

3-(dlmcthylphosphonoIpropionic acid l)imethylolmclsminc 1 1 V v Adduct of p-tcri. monylpln-nol and 9 mols 0i cthylcnc oxide p of tho liquor, adjustcd with NmI0I (1.1L:

TABLE VI Treated lnllquor Flameprooi character Untreated I II III IV V VI VII VIII IX X X1 After rinsic )(ignltion time Ssacon s Burning time (scconds) 0 O 0 0 D 0 (1 0 0 (I Tear length, cm 11.5 12 11 11.5 10.5 11.5 9.5 10 1015 10 11 After XSNV-3 (ignition time 8 seconds):

Burning time (seconds). do 0 0 0 0 (1 0 0 0 Q (l (1 Tear length, cm 13 13 13 12. 5 13 12 11 10 13 10 After 1DXSNV-3 (ignition tims 10 scconds):

Burning time (scconds) 0 D 0 0 0 0 Tear length, cm 13 13 12 13 11 8 12 12 10 TABLE VII Trcatcd with liquor Flamcpronicllarcctcr Ifutrmtnd l II III Iv v \'I vn \111 [X x xi Aitvr rinsciflgnltiou timu l0 sccunr 5):

Burning iimn (seconds).P 0 i1 0 i1 (1 (l (I 0 0 (I (l Tear length, cm 12 12 13 13 14 13 13 13 11 IL! 12 TABLE V[I[ Treated with liquor Flamcprcoi character Untreated I II V VII VIII IX X XI After 5XSNV 3 (ignition time 10iscci)lnds)(: d5) 0 Burn ng me secon 0 0 0 (1 (1 0 0 'Icarlcngih, cm i "in; 13 12. s 12. s 10 1a 13 12 Example 15 aminoplast).

The procedure described in Example 14 is followed (:50 or 67:33 polyester-cotton fabric), but various aminoplast precondensatcs (component 3) are used. The following aminoplast precondensates are employcd:

Product 1: Dimcthylolmelaininc Product 2: l-lexamethylolmclaminc-dimethyl-cthcr Product 3: Hexamcthylolmclamine Product 4: Dimcthylolurca.

The p value is in each case 5.5 and is adjusted with Na Po SC percent solids content PC percent phosphorus content NC percent nitrogen content.

The flameproof character is tasted in accordance with DIN 53,806.

The handle ratings denote:

0 unchanged 1 a trace stiffer than 0 ln addition of Ric-2,3-dibromo-2-chloropropyl- -2 slightly stiffer than 0 phosphate (component 4) improves the flameproofing -3 i= stiff cffcct and the handle of the fabric. All liquors contain -4 very stifi. 57.5 g of P per litre and 17.5 g of N per litre (from the Table IX contains the compositions of the liquors.

TABLE IX Percent Treated with liquor Constituents (amounts in gJl.) SC PC NC I II III IV V 'IHPC 13 330 330 330 330 as 3-(dimethylphosphouo)-propionic acld-N-methylolamide 8O 11. 7 5.3 125 125 125 125 125 Product 1 ..!00 41.5 42 42 Product 21,1 15 Product 3 Product 4 Trig-2,3411br0mo2chl0r0propylphflsp flw Adduct oi p-tert.-nonylphenol and 9 mols of ethylene oxide I 1 1 1 1 Table X contains the results of testing the flameproof character, and the rating of the handle.

TABLE X Polyester-cotton mixed fabric: 50:50:1 polyester-cotton mixed fabric: 67:33:13

Treated with liquor 1 II 111 I\' Flarneproof character Untreated A B A B A B A 7 ll li V After rinse (ignition time 12 seconds);

t zii li fig t l i iilif f ifi iI:::::::i """'i 1? 1 13 13.? iii 1.1 13.2 13.2 11.2 13 After 5 SNVA3 (ignition time 12 seconds):

Burning time (sceouds)l (I ll (I n 0 v g g 1 V V n V n (I Tl xu -l( ng\l1,cm a (ln..., 123.5 13.5 13 13.5 12 13 V 1 n I. L5 1: ltntlng of linmllc (after lll SC) -2 2 3 3 3}., 3' 3 & -13

What we claim is: thereof. 1. A process for flameproofing polyester and cellu- 6. A process according to claim 1 in which compolose fibre blends comprising: nent (4) is a polyhalogenated phosphoric acid trialkyl i. Applying to said blend an aqueous preparation ester.

hi h t i 7. A process according to claim 1 in which compofrom 180 to 320 grams er liter of a t t aki nent (4) is a polyhalogenated phosphoric acid trialkyl (hydroxymethyl)-phosphonium salt ester wherein said alkyl groups contain at most four 2. from 30 to 220 grams per liter of a product of carbon atoms and each alkyl group contains 2 or 3 halformula ogen atoms.

8. A process according to claim I in which component (4) is tris-(2,3-dibromo-2-chloro-propyl)- m-o o C1Iz()(Y),, (II): phosphate or tris-(2,3-dibromopropyl)-phosphate.

Z 9. A process according to claim 1 in which compo- \EHJIPKCHZOIDM nent (ll comprises a tetrak1s-(hydro tymcthyhphosphomum halide, component (2) comprises a compound of formula wherein n is l or 2.

R and l t each is alkyl, alkenyl or halogenoalkyl with at most four carbon atoms,

X is hydrogen or methyl and Y is alkyl with at most four carbon atoms, or hydro- P gen, 111-1 x 3. from 10 to 90 grams liter of an aminoplast precondensate 4. from O to 140 grams per liter of an aliphatic or aromatic polyhalogenated phosphoric acid trialkyl or triaryl ester,

ii. Drying the blend treated in accordance with Step (i) and iii. Thereafter curing the dried blend at a temperature between about 100 and 200C.

2. A process according to claim 1 in which component (I) is a tetrakis-(hydroxymethyl)'phosphonium halide.

3. A process according to claim 1 in which component (2) comprises a compound of formula in which R, and R, each is alkyl, alkenyl or halogenoalkyl with at most four carbon atoms,

X is hydrogen or methyl and Y is hydrogen or aklyl with at most four carbon atoms.

4. A process according to claim 1 in which component (3) is the methylol or methylol alkyl ether derivative of urea, ethyleneurea or melamine.

in which Y is hydrogen or methyl and R and R each is methyl or ethyl component (3) is a methylolmelamine or an alkylether thereof and component (4) is a polyhalogenated phosphoric acid trialkylester wherein each alkyl group contains up to four carbon atoms and contains 2 or 3 halogen atoms.

11. A polyester and cellulose fiber mixture having a flameproof finish formed according to claim 1.

12. A process according to claim 2 in which tetrakis- (hydroxymethyl)-phosphonium chloride is used.

13. A process according to claim 3 in which Y is hydrogen or methyl, R, and R, each is methyl or ethyl and X is hydrogen.

14. A process according to claim 3 in which Y is hydrogen, X is hydrogen and R, and R, each is methyl.

15. A polyester and cellulose fiber mixture having a flameproof finish formed according to claim 9.

16. An aqueous flameproofing preparation for polyester-cellulose fiber mixtures containing as essential flameproofing components 1. from 180 to 320 grams per liter of a tetrakis- (hydroxymethyl)-phosphonium salt,

2. from 30 to 220 grams per liter of a product of formula 11,- o CI[:O(Y),,-,(II):

ong-(1311A) O-N\ Rq-O X (ID -KCIhOHhwherein n is l or 2,

R, and R, each is alkyl, alkenyl or halogenoalkyl with, at most four carbon atoms,

X is hydrogen or methyl and Y is alkyl with at most four carbon atoms, or hydrogen,

3. from to 90 grams per liter of an aminoplast precondensate,

4. from 0 to 140 grams per liter of an aliphatic or aro matic polyhalogenated phosphoric acid trialkyl or triaryl ester.

17. An aqueous flameproofing preparation for polyester-cellulose fiber mixtures containing as essential flame-proofing components 1. from 180 to 320 grams per liter of a tetrakis- (hydroxymethyl)-phosphonium halide, 2. from 30 to 220 grams per liter of a compound of the formula Rl-U Rr-O

in which R, and R, each is alkyl, alkenyl or halogenoalkyl with at most four carbon atoms,

X is hydrogen or methyl and Y is hydrogen or alkyl with at most four carbon atoms,

3. from 10 to grams per liter of the methylol or methylolalkylether derivative of urea, ethyleneurea or melamine and 4. from 0 to grams per liter of a polyhalogenated phosphoric acid trialkylester.

18. An aqueous flameproofing preparation for polyester-cellulose fiber mixtures containing as essential flame-proofing components 1. from to 320 grams per liter of tetrakis- (hydroxymethyl)-phosphonium chloride 2. from 30 to 220 grams per liter of a compound of the formula in which Y is hydrogen or methyl and R, and R, each is methyl or ethyl,

3. from 10 to 90 grams per liter of a methylolmelamine or an alkylether thereof and 4. from 0 to I40 grams per liter of a polyhalogenated phosphoric acid trialkylester wherein each alkyl group contains up to four carbon atoms and contains 2 or 3 halogen atoms. 

2. from 30 to 220 grams per liter of a compound of the formula
 2. from 30 to 220 grams per liter of a product of formula
 2. from 30 to 220 grams per liter of a product of formula
 2. A process according to claim 1 in which component (1) is a tetrakis-(hydroxymethyl)-phosphonium halide.
 2. from 30 to 220 grams peR liter of a compound of the formula
 3. from 10 to 90 grams per liter of an aminoplast precondensate,
 3. A process according to claim 1 in which component (2) comprises a compound of formula
 3. from 10 to 90 grams liter of an aminoplast precondensate
 3. from 10 to 90 grams per liter of the methylol or methylolalkylether derivative of urea, ethyleneurea or melamine and
 3. from 10 to 90 grams per liter of a methylolmelamine or an alkylether thereof and
 4. from 0 to 140 grams per liter of a polyhalogenated phosphoric acid trialkylester wherein each alkyl group contains up to four carbon atoms and contains 2 or 3 halogen atoms.
 4. from 0 to 140 grams per liter of a polyhalogenated phosphoric acid trialkylester.
 4. from 0 to 140 grams per liter of an aliphatic or aromatic polyhalogenated phosphoric acid trialkyl or triaryl ester, ii. Drying the blend treated in accordance with Step (i) and iii. Thereafter curing the dried blend at a temperature between about 100* and 200*C.
 4. A process according to claim 1 in which component (3) is the methylol or methylol alkyl ether derivative of urea, ethyleneurea or melamine.
 4. from 0 to 140 grams per liter of an aliphatic or aromatic polyhalogenated phosphoric acid trialkyl or triaryl ester.
 5. A process according to claim 1 in which component (3) is a methylolmelamine or an alkylether thereof.
 6. A process according to claim 1 in which component (4) is a polyhalogenated phosphoric acid trialkyl ester.
 7. A process according to claim 1 in which component (4) is a polyhalogenated phosphoric acid trialkyl ester wherein said alkyl groups contain at most four carbon atoms and each alkyl group contains 2 or 3 halogen atoms.
 8. A process according to claim 1 in which component (4) is tris-(2,3-dibromo-2-chloro-propyl)-phosphate or tris-(2,3-dibromopropyl)-phosphate.
 9. A process according to claim 1 in which component (1) comprises a tetrakis-(hydroxymethyl)-phosphonium halide, component (2) comprises a compound of formula
 10. A process according to claim 1 in which component (1) is tetrakis-(hydroxymethyl)-phosphonium chloride, component (2) is a compound of the formula
 11. A polyester and cellulose fiber mixture having a flameproof finish formed according to claim
 1. 12. A process according to claim 2 in which tetrakis-(hydroxymethyl)-phosphonium chloride is used.
 13. A process according to claim 3 in which Y is hydrogen or methyl, R1 and R2 each is methyl or ethyl and X is hydrogen.
 14. A process according to claim 3 in which Y is hydrogen, X is hydrogen and R1 and R2 each is methyl.
 15. A polyester and cellulose fiber mixture having a flameproof finish formed according to claim
 9. 16. An aqueous flameproofing preparation for polyester-cellulose fiber mixtures containing as essential flameproofing components
 17. An aqueous flameproofing preparation for polyester-cellulose fiber mixtures containing as essential flame-proofing components
 18. An aqueous flameproofing preparation for polyester-cellulose fiber mixtures containing as essential flame-proofing components 